749. 

 EUMERUS LITORALIS. 



Order Diptera. Fam. Syrphidae. 



Type of the Genus, Syrphus tricolor Fah. 



EuMERUs Meig., Mcq., Curt. — Eristalis, Thereva Fab. — Syrphus 

 Fab., Panz. — Milesia Lat. — Pipiza Fall. 



Antenna smallest in the male, inserted in front of the face, ap- 

 proximating, divaricating, small and 6-jointed, basal joint short, 

 2nd much larger, cup-shaped and bristly, 3rd large compressed, 

 more or less ovate, the apex truncated obliquely with a fovea 

 on the outside, 4th joint cup-shaped, seated towards the base 

 of the 3rd, 4th small oblong, 5th a moderate seta incrassated 

 towards the base (3). 



Labrum very short and stout, the apex notched and lobed (Z»). 

 Tongue lanceolate (c) : a short piece (*) which did not seem to 

 be any portion of the tongue, was separated from it and at- 

 tached closer to the base of the labium. 



Maxilla short horny lancets, a little falcated, the apex rounded 

 (e). Palpi much shorter, linear, pubescent, the apex rounded 

 and producing a few strong hairs {f). 

 Lip short thick, bilobed and slightly bristly {g). 

 Trophi received into a small orifice at the apex of the head (2*) which 

 is semiorbicular : face very hairy, simply convex : eyes large, more 

 or less pubescent, meeting on the forehead in the males and leaving 

 a long triangular space behind ; moderately remote in the females 

 (2) .• ocelli 3, forming a spacious triangle on the crown. Thorax 

 scarcely broader than the head, orbicular-quadrate : scutel semior- 

 bicular, the edge margined with short bristles. Abdomen subelUp- 

 tic and depressed, or slightly convex with coarctate segments, the 

 apex incurved and rounded, with the sexual organs beneath. Wings 

 moderate, incumbent, parallel, the apical transverse nervure sinuated, 

 somewhat bilobed: halteres capitate. Legs rather short, hinder 

 longer and stout, with the thighs incrassate and serrated with a 

 double row of minute teeth beneath towards the extremity: the tibia? «re 

 curved and swell a little at the middle (8 (J) .• tarsi rather short and 

 5-jointed, basal joint short, longer and stouter in the hinder pair, 

 4th lunate, 5th short and broad : claws short : pulvilli bilobed. 



LiTORALis Curt. — Guide, Gen. 1229. 



Male shining greenish-black, punctured, face metallic green, 

 with scattered white hairs : antennae testaceous : eyes casta- 

 neous-brown : thorax with 2 narrow grey stripes down the 

 back : abdomen bright ochreous, with 3 white lunules on each 

 side of the three first segments, all of which are brownish at 

 the base, 3rd and 4th slightly eneous : nervures piceous : legs 

 brownish, anterior the darkest, base of tibiae and of 4 anterior 

 tarsi ochreous, hinder tibiee with whitish pubescence. 



In the Cabinets of Mr. Dale and Mr. Rudd. 



